Mueller #3333 Hinged knee support provides protection and support for weak or injured knees that need extra medial/lateral support without restricting mobility. The trademarked Triaxial Hinge correctly tracks the knee and generates close to normal joint motion of your knee. Wraparound design provides for easy on/off application, as the open back helps to eliminate bunching behind the knees. Knee Cap buttress stabilizes and guards the knee cap patella. Straps that are adjustable provide a customized fit and controlled compression. Edges have smooth seams to help avoid irritation and rubbing. Black color, (Measure around center of knee for correct sizing.)